Oil burner



March 31. 1925.

B. A. scHAuMANN OIL BURNER Filed Dec. 5, 1924 My; m/M 0pm,)

March 31. 1925. 1,531,819

B. A. SCHAUMANN a OIL BURNER Filed Dec. 5. 1 2 2 Sheets-Sheet 2 Patented" Mar. 31 1925.

1,531,819 PATENT oFF'lcE.

ammo A. sonaomamw, or MILWAUKEE, WISCONSIN.

on. BURNER.

Application filed December 5, 1924. Serial No. 754,138.

To all whom it may concern:

Be it known that I, BRUNO A. SGHAU- MANN, a citizen of the United States, and

resident of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Oil Burners; and I do hereby declare that the following is a full, clear, and exact descri tion thereof.

T is invention relates to oil burners.

Objects of this invention are to provide an oil burner in which the incomin vided into two portions, one which is highl heated and is passed directly downward y against a baffle plate and the other of which is heated and mixed with the fuel and,

thereafter,'mixed with the downwardly pro jected blast of air so that a complete and perfect burning of the fuel takes place and thereby permits the use of crude oil of low volatility.

Further objects are to provide an oil burner in which a gas pilot light is supplied which will reignite the combustible material even if the furnace should be stopped through any unusual occurrence, and in which the "pilot light is so constructed that its upper portion forms a deflector for parting the downwardly passing blast of hot air and vaporized fuel.

Further objects are to provide an oil burner in which means are provided for feeding the oil into a stream of heated air,

"in which automatic means are provided whereby if this stream of air should cease to flow, the oil will be pocketed and will not flood the burner, but will be led outwardly so that it may be used to actuate an automatic out off device.

Further objects are to provide an oil burning system having the divided air stream discussed above, which is so constructed that the relative volume of the two streams of air may be readily controlled to vary the action of the furnace, and to secure the utmost eflicieney for the particular grade of oil used, and to provide an oil burnerin which a high conservation of heat is attained, and in which this conserved heat is used for preheating the air thus in effect constituting a regenerative apparatus.

Anembodiment of the invention is shown in the accompanying drawings, in which Figure 1 is a vertical sectional view through a furnace, such view showing the burner partly in section.

air is di-' Figure 2 is anenlarged sectional detail of a ortion of the burner.

igure 3 is a plan view of the burner pro er.

F1gure 4 is a plan view of the preheating elevated air pipe.

Fi ure 5 is an enlarged sectional view on the lme 5-5 of Figure 4.

Figure 6 is an enlarged sectional view on the line 66 of Figure 1.

Referring to the drawing, it will be seen that a conventional ty e of furnace has been shown inwhich-the re box 1 is provided with a grate 2 and with a firing opening 3. As is customary in these furnaces, a ledge 4 has been shown adjacent thefiring opening.

The device comprises an air chest or compartment 5 supplied by means of an air pipe. 6 leading from a rotary blower 7, such blowor being convenientlyoperated by means of" an electric motor 8. It is to be noted that 3, is preferably of elongated formation. It is provided witha slanting upper face 13 above which a similarly shaped baflie plate is spaced upwardly a slight distance from the portion 13, and if desired packing 15 may be interposed between the baffle plate 14 and the portion 13. A small 'gas pipe 16 extends upwardly through the air chest 5 and is screwed through the baffle late 14. Its upper end is screwed into a de ector 17 (See Figure 2.) This deflector is provided with outwardly opening apertures 18 through which the gas may discharge, such apertures, therefore, acting in the manner of small pilot lights which are continuously .1n operation, and thus insure reignition of the combustible material if for any reason the furnace should be temporarily stopped. This gas pipe 16'continues downwardly and passes through a fitting or elbow of the air supply pipe 6. It extends outwardly, as indicated at 20, and is connected to the gas mains in any suitable manner.

The air chest 5 is provided with a pair of upwardly opening discharge apertures 21 and 22. These apertures receive the lower ends of upwardly arching casings 23 and The air chest 5, as clearly shown in Figures 1 and wardly from the deflector 17 and from the baffle plate 14, as clearly shown in Figural.

Preferably, the casings 23 and 24 are pointed Q on their inner sides through the major portion of their extent, as shown clearly in the sectional viewFigure 6.

It is to be noted that the casings 23 and 24: form a unitary casting and have a relatively thickened conical portion 26 in their center part, such conical portion being aperturcd for a purpose hereinafter to appear.

Theparts thus far described constitute one of the main air circulating portions of the system. The other air circulating portion comprises the air pipe 27 connected with the portion 11 of the blower.. (See Figure 1.) This air pipe 27 extends upwardly, as indicated at 28 and thereafter extends transversely, as indicated at 29 in Figures 1 and 1. It passes forwardly above the ledge 4 at the door of the furnace and through suit ablefittings is joined to the lateral arm 30 of a main fitting 31. This fitting 31 in turn is joined to a transverse pipe 32 (see Figures 1 and 4) which parallel the pipe 29, as shown. This pipe is provided with a downwardly and laterally curving extension 33 which is connected by means of a horizontal pipe 34 and an elbow 35 with a downwardly extendin short pipe 36, such short pipe loosely tting the aperture in the conical portion 26 of the casings 23 and 24;, as clearly shown in Figure 1.

Thus the second air supply is finally mingled with the first air supply and both are directed downwardly against the de flector 17.

Means are provided for supplying fuel oil to the second air supply. This is readily accomplished by means of the fitting 31. (See Figures 1, a and 5.) An oil supply pipe 37 extends into the fitting 31 and pro jects part way thereacross, as shown in Figures 4 and 5. Its outer end is preferably beveled, as indicated at 38 in Figure 5, and stops short of the pipe 32. When heated air is passing through the ipe in a relatively rapid manner it vaporlzes and carries the oil directly through the pipe 32. -However, if for any reason this air supply should stop andthe oil should not be picked up, it will drop upon the slanting bottom portion 39 of the fitting 31 (see Figure 5) and will accumulate in its lower portion and run into the discharge oroverflow pipe 40. It is intended that this overflow shall be led to any suitable type of automatic cut off in the usual manner to prevent further discharge ofoilwhen the apparatus is not in operation- A The operation of the apparatus is as follows :--The air is forced b the blower into through the loops 29 and '32 and becomes highly heated. During this portion of its passage it becomes mixed with the vaporized oil in the fitting 31 and carries this rich mixture downwardly to the burner proper discharging it through the short vertical pipe 36.- The other stream of air passes into the air chamber or chest 5 and is highly heated.- It is further heated in passing through the casings 23 and 24 and is forced downwardly in a very hot violent blast past the pipe 36 thus mixing with the carburetted heated air discharged by the pipe 36 and producing an intensely hot flame.

The pilot light is constantly furnished by means of the gas pipe 20 and if the fur- -nace should be stopped and then started such pilot light will insure the ignition of the combustible material. It will be noted that it is impossible to blow out the pilot light as it is shielded by the deflector 17 It will thus be seen that an oil burning apparatus has i been provided in which means are supplied for highly heating the air, for intimately mixing the air and vaporizing oil, and for insuring a complete and thorough combustionof the oil.

It will further be seen that a very simple means has been provided for' preventing flooding of the burner in case the operation is stop ed, and it will be noted further that 1 0 a simp e type of pilot light has also been supplied.

Although the invention has been described in considerable detail, it is to be understood that the invention may be variously em- 1 bodied and is, therefore, to .be limited only asclaimed.

I claim:

An oil burning apparatus comprising an air chest, a pair of upwardly extending cas ings communicating with said chest and extending upwardly therefrom and arching over and joining, said casings having a sharp inner edge and having a downwardly directed outlet portion located above said air chest,

a baffle plate located above and spaced from said air chest and located below said outlet, an air heater pipe extending across and above said casings and having an outlet portion extending downwardly into said casing to a point adjacent said outlet, a fitting interposed in said air heating pipe and having a depressed portion, means for feeding oil into said fitting, and an overflow connected with said depressed portion. 5

In testimony that 1 claim the foregoing I have hereunto set my hand at Milwaukee, in the county of Milwaukee and State of Wisconsin.

BRUNO A, SCHAUMANN; 

